Describe the incident involving Das Ganu's attire for his kirtan performances as recounted in Chapter 15.

Chapter 15 narrates an interesting story about the devotee Das Ganu and his attire. When he was scheduled to perform a kirtan in Thane, he dressed very simply, with a bare torso, no turban, and only a simple cloth around his waist. The chapter explains this was due to an earlier experience in Shirdi. On that occasion, Das Ganu had dressed elaborately in a tunic, a shoulder cloth, and a turban. When he went to bow to Sai Baba, Baba teasingly remarked, "Bravo! A bridegroom has been decked out now!" and questioned the need for such finery, stating, "We do not need all that." This gentle correction from Baba influenced Das Ganu's subsequent simple appearance during his devotional performances.